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Commit 4e29198e authored by Linas Vepstas's avatar Linas Vepstas Committed by Linus Torvalds
Browse files

Add extra arch overrides to asm-generic/checksum.h 



There are plausible reasons for architectures to provide their own
versions of csum_partial_copy_nocheck and csum_tcpudp_magic.
By protecting these, the architecture can still re-use the
asm-generic checksum.h, instead of copying it.

Signed-off-by: default avatarLinas Vepstas <linas@codeaurora.org>
Acked-by: default avatarArnd Bergmann <arnd@arndb.de>
Signed-off-by: default avatarRichard Kuo <rkuo@codeaurora.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 4f4567cf

include/asm-generic/checksum.h

+4 −0
Original line number Diff line number Diff line
@@ -33,8 +33,10 @@ extern __wsum csum_partial_copy(const void *src, void *dst, int len, __wsum sum) 
extern __wsum csum_partial_copy_from_user(const void __user *src, void *dst,

					int len, __wsum sum, int *csum_err);



#ifndef csum_partial_copy_nocheck

#define csum_partial_copy_nocheck(src, dst, len, sum)	\

	csum_partial_copy((src), (dst), (len), (sum))

#endif



/*

 * This is a version of ip_compute_csum() optimized for IP headers,
@@ -63,12 +65,14 @@ csum_tcpudp_nofold(__be32 saddr, __be32 daddr, unsigned short len, 
		unsigned short proto, __wsum sum);

#endif



#ifndef csum_tcpudp_magic

static inline __sum16

csum_tcpudp_magic(__be32 saddr, __be32 daddr, unsigned short len,

		  unsigned short proto, __wsum sum)

{

	return csum_fold(csum_tcpudp_nofold(saddr, daddr, len, proto, sum));

}

#endif



/*

 * this routine is used for miscellaneous IP-like checksums, mainly